Holding-vise attachment.



c. H. A. DAVIS. HOLDING VISE ATTACHMENT.

CHARLES HENRY ALEXANDER DAVIS, 01! SAN RAFAEL, CALIFURNIA.

HOLDING-V1815 ATTACHMENT.

Specification of Letters Patent.

Patented May '7, 1912.

Applicatior dled October 27, 1910. Serial No. 589,503.

To all whom it may concern Be. it known that I, CHARLES I'IENRYALEXANDER DAVIS, a citlzen of the United States, residin at San Rafael,in the county of Marian an State of California, have invented new anduseful Improvements in Holding-Vise Attachments.

My invention relates to an attachment for holding vises.

It consists of a pair of supplemental jaws adapted to fit between themain permanent jaws of the vise, and having the backs or contactingsurfaces of said jaws made convex and with suitable supporting flanges.The inner faces of the jaws consist of interlocking In with suitablegripping surfaces; the o ject of the jaws being to enable them toautomatically engage taperin or irre lar forms without change in the awsof tie main vise.

It also comprises details of construction which will be more fullyexplained by reference to the accompanying drawings, in which- Figure 1is a plan view showing the application of my invention to an ordinaryvise. Fig. 2 is a side elevation. Fig. 3 is a pers ective view of theseparated jaws.

T ese jaws may be applied to any vise having plain, straight aws such asindicated at A. The jaws 2 may be also made of an suitable material forthe purposes for w ich they are to be used. The vertical back portion 2'-of each jaw rests against the corresponding vertica straight face ofthe vise, and these faces 2 are convexly curved so that if a tapering orirregular article is to be held between the jaws, the closing of thevise will cause these jaws to automatically adjust themselves so as topreserve an even grip upon the whole of the surface, thus a tapering orwedge-shaped article may be held between these jaws which will grip itfirmly from end to end.

In order to retain the jaws in place, I have shown lips or flanges 8which project from the top above the convex surfaces, and these lips orflanges resting upon the top of the vise will prevent the su plement-aljaws from falling out when t e vise is open.

The interior faces of the jaws are made with projecting tongues 4alternating so that when the jaws are closed together these tonguesinterlock. The inner surfaces of the tongues may be made concave, asshown at 5, and may also have these concave surfaces corrugated or madeto grip with a firm hold. If a lar e article is placed between thesejaws an the vise closed, it will be seen that the curved backs of thejaws will cause them to incline with relation to the article which isbeing held; thus a tapering rod will be held firml between the aws,which, if the article is arge, will not lnterlock at all. If the article1s small the teeth will interlock, and they may interlock to such anextent that the smallest wire will be firmly gripped between them. Apair of these aws may be fitted to any vise and thus render itserviceable for firmly holding tapering or irregular forms withoutmutilating the faces of the main jaws or making any permanent attachmentfor the supplemental jaws.

Having thus described my invention, what I claim and desire to secure byLetters Patent is- 1. The combination with a vise havin parallel jaws,of a pair of supplementa jaws having horizontally convex backs andoverhanging flanges, and vertical, concave, corrugated. and interlockinglugs projecting from the inner faces of said jaws.

2. Su plcmental holdin jaws, having convex backs adapted to t betweenplain vise jaws, lips or flanges projecting from the upper portion torest upon the to s of the vise jaws, and interlocking lugs orming theinner ippin surfaces of said jaws.

3. Indepen out he ding jaws for vises, said jaws having convex backs andoverhangin lips to contact with and be sup ported y the main jaws. andinterlocking ton es forming the holding portions of sfai jaws and avingconcave, corrugated aces.

CHARLES HENRY ALEXANDER DAVIS.

Witnesses:

Sam J swam. DAVIS, Eva A. Lrou.

00 m of this patent my be obtained for an cents each, by addressing thecommissioner of .htenh, wuhlnzton, D. 0.

